Francis Appiah, left, an environmental biologist with Cal Trans, wears a face mask in the likeness of a mountain lion known as P-22 while attending the Wallis Annenberg Wildlife Crossing Groundbreaking Ceremony in Agoura Hills. Spanning over ten lanes of the 101 freeway, when complete, the crossing will be the largest in the world, the first of its kind in California and a global model for urban wildlife conservation.
(Mel Melcon/Los Angeles Times)